Patent US933258A successfully refreshed from Google Patents.
EP0319293A2
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Display device
Assignee: Central Research Laboratories Ltd
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Filing: 1988-12-01
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Granted: —
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Expires: 2008-12-01
Abstract
Abstract A display device has a lattice of pixel elements each selectably settable. A method of operating the display device comprises the steps of receiving a signal representing a picture for display during a display period and illuminating the lattice to produce, during a first interval within the display period, a first light output from the lattice having a first predetermined colour characteristic and to produce at least one additional light output from the lattice. Each said additional light output has a different predetermined colour characteristic and a respective interval within the display period separate from the first interval. The method further comprises the step of time-multiplex addressing blocks of pixel elements a plurality of address times during each interval. The addressing step includes setting a group of blocks, the group consisting of a plurality of blocks spaced apart in the addressing sequence such that the blocks in the group form a series with adjacent blocks having a temporal separation in the addressing sequence exhibiting a geometric progression with a common ratio N being an integer equal to 2 or more. In this way, addressing of the lattice occurs simultaneously with its illumination by the appropriate colour, allowing a greater proportion of the frame time for the addressing operation so that additional addressing information can be utilised.
Inventors
- 👤 Steven David Bull
- 👤 Christopher James Morris
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 14:45
CPC Classifications
G; G09; G09G; G09G3/00; G09G3/20; G09G3/34; G09G3/3406; G09G2310/00; G09G2310/02; G09G2310/0202; G09G2310/0218; G09G2310/0235; G09G2310/06; G09G2310/061; G09G3/2007; G09G3/2018; G09G3/2022
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
170 words
A method of operating a display device having a lattice of pixel elements each selectably settable, the method comprising: receiving a signal representing a picture for display during a display period; illuminating the lattice to produce, during a first interval within the display period, a first light output from the lattice having a first predetermined colour characteristic and to produce at least one additional light output from the lattice, each said additional light output having a different predetermined colour characteristic and having a respective interval within the display period separate from the first interval; and time-multiplex addressing blocks of pixel elements a plurality of address times during each interval; the addressing step including setting a group of blocks, said group consisting of a plurality of blocks spaced apart in the addressing sequence such that the blocks in said group form a series with adjacent blocks having a temporal separation in the addressing sequence exhibiting a geometric progression with a common ratio N being an integer equal to 2 or more.
Claim 2
Independent Claim
170 words
A method of operating a display device having a lattice of pixel elements each selectably settable, the method comprising: receiving a signal representing a picture for display during a display period; illuminating the lattice to produce, during a first interval within the display period, a first light output from the lattice having a first predetermined colour characteristic and to produce at least one additional light output from the lattice, each said additional light output having a different predetermined colour characteristic and having a respective interval within the display period separate from the first interval; and time-multiplex addressing blocks of pixel elements a plurality of address times during each interval; the addressing step including setting a group of blocks, said group consisting of a plurality of blocks spaced apart in the addressing sequence such that the blocks in said group form a series with adjacent blocks having a temporal separation in the addressing sequence exhibiting a geometric progression with a common ratio N being an integer equal to 2 or more.
Claim 3
Dependent Claim
59 words
A method according to Claim 1 wherein said step of illuminating the lattice includes a first step of illuminating the lattice during said first interval with a light source of said first predetermined colour characteristic and a second step of illuminating the lattice during said a respective interval with a light source of said a different predetermined colour characteristic.
Claim 4
Independent Claim
20 words
A method according to Claims 1 or 2 further comprising the step of blanking the lattice prior to each interval.
Claim 5
Dependent Claim
39 words
A method according to Claim 3 dependent on Claim 2 wherein the step of blanking the lattice prior to each interval has a longer duration than a switching period between said first and second steps of illuminating the lattice.
Claim 6
Independent Claim
51 words
A method according to any one of the preceding claims wherein the number of address times for said first interval is greater than the number of address times during said a respective interval whereby the resolution of said first predetermined colour is greater than the resolution of said different predetermined colour.
Claim 7
Independent Claim
26 words
A method according to any one of the preceding claims wherein said first predetermined colour is green and the different predetermined colours are red and blue.
Claim 8
Dependent Claim
192 words
A display device comprising: a lattice of pixel elements, each selectably settable in dependence on a respective part of a received signal representing one picture for display in a display period; means for illuminating the lattice to produce, during a first interval within the display period, a first light output from the lattice having a first predetermined colour characteristic and to produce at least one additional light output from the lattice, each said additional light output having a different predetermined colour characteristic and having a respective interval within the display period and separate from the first interval; and means for effecting time-multiplex addressing of blocks of pixel elements according to a predetermined sequence, each block being addressed a plurality of address times for each interval of the illumination means; the addressing means including means for setting a group of blocks, said group consisting of a plurality of blocks spaced apart in the addressing sequence such that the blocks in said group form a series with adjacent blocks having a temporal separation in the addressing sequence exhibiting a geometric progression with a common ratio N being an integer equal to 2 or more.
Claim 9
Dependent Claim
192 words
A display device comprising: a lattice of pixel elements, each selectably settable in dependence on a respective part of a received signal representing one picture for display in a display period; means for illuminating the lattice to produce, during a first interval within the display period, a first light output from the lattice having a first predetermined colour characteristic and to produce at least one additional light output from the lattice, each said additional light output having a different predetermined colour characteristic and having a respective interval within the display period and separate from the first interval; and means for effecting time-multiplex addressing of blocks of pixel elements according to a predetermined sequence, each block being addressed a plurality of address times for each interval of the illumination means; the addressing means including means for setting a group of blocks, said group consisting of a plurality of blocks spaced apart in the addressing sequence such that the blocks in said group form a series with adjacent blocks having a temporal separation in the addressing sequence exhibiting a geometric progression with a common ratio N being an integer equal to 2 or more.
Claim 10
Dependent Claim
32 words
A display device according to Claim 7 wherein the illumination means comprises a light source of said first predetermined colour characteristic and a light source of each said different predetermined colour characteristic.
Claim 11
Dependent Claim
20 words
A display device according to Claims 7 or 8 further comprising means for blanking the lattice prior to each interval.
References Cited (Backward Citations)
No citation records indexed.
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